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' 2 eeeeeeeeeeee 1. MERRIL J. B OF MAKING T BUCK No. 462,499. PatentedN0v.3,1891.

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E. W. MERRILL 8: J. BASS.

ART OF MAKING TURN BUGKLES In uenfom Znesses:

UNITED STATES PATENT OFFICE.

EDWARD W. MERRILL AND JAMES BASS, OF BROOKLYN, NEIV YORK, ASSIGNORS TOMERRILL BROTHERS, OF SAME PLACE.

ART OF MAKING TURN-BUCKLES.

SPECIFICATION forming part of Letters Patent No. 462,499, dated November3, 1891.

Application filed January 24, 1891. Serial No. 378,880. (No model.)

To all whom, it may concern:

Be it known that we, EDWARD \V. MERRILL and JAMES BASS, both of the cityof Brooklyn, in the county of Kings and State of New York, have inventeda new and useful Improvement in the Manufacture of Turn- Buckles, ofwhich the following is a specification, reference being had to theaccompanying drawings.

In the manufacture of wrought-iron turnbuckles by machinery it has longbeen recognized as desirable to make use of the operation of rolling forthe manufacture of blanks to be afterward finished by other operations.There has, however, been a defect in the rolled blanks, consisting inthe want of sufficient fullness of the metal in the heads or endportions at and near where they unite with the side straps of theturn-buckle.

The object of our invention is to overcome this defect; and to this endour invention consists in the manufacture of turn-buckles by thesuccessive rolling, punching, and upsetting operations hereinafterdescribed.

In the accompanying drawings, Figure 1 represents a sectionperpendicular to their axes of portions of a pair of rolls for rolling aturn-buckle blank, a bar being shown between the said rolls undergoingthe operation of conversion into a blank. Figs. 2 and 3 representvertical sections at right angles to each other of a punch and die, bywhich the blank rolled by the rolls shown in Fig. 2 has punched in it anopening to form the sides of the turn-buckle, the blank being shown asin the die ready for the action of the punch. Figs. 4 and 5 are sectionsat right angles to each other of a die and punch for upsetting the headsof the punched blank, the blank being also shown in the die. Fig. 6represents a face View, and Fig. 7 a longitudinal section, of the blank,which we first produce by rolling from a bar. Fig. 8 is a face View, andFig. 9 alongitudinal section, of the blank after a longitudinal openinghas been punched in it to form the straps or sides of the turnbuckle.Fig. 10 is a face view, and Fig. 11 a longitudinal section, of theturn-buckle completed, except as to the making of the holes in the headsor ends to form the nuts.

Similar letters of reference designate corresponding parts in all thefigures.

I will first refer, briefly, to Figs. 10 and ll of the drawings, inwhich a a designate the end portions or heads of the turn-buckle, and I)b the side straps. In Fig. 11 the requisite fullness, which it is theparticular object of our invention to obtain, is indicated at Thisfullness is also indicated by dotted outline in Fig. 9, in which thewant of fullness at the points is shown by the bold outline within saiddotted lines. The absence of this fullness is also shown in Fig. 7. Thisblank (shown also in Fig. 0) consists of a central portion c with twosimilar end portions 0. a to form the ends, the said central portionbeing represented as having depressions in its faces, which leave only athin web 10 to be removed to leave the straps b b of the turn-buckle.The external contour of said blank is in all particulars, except as tothe want of fullness at and some excess in length of the end portions aat, approximately that which the finished turn-buckle is intended tohave. The sides A A provided in the rollers B B (see Fig. 1) for rollingthe blank, Figs. 6 and '7, are each one-half of a horizontally-dividedcounterpart of the said blank, no attempt being made in the said dies toproduce the fullness desired at the points in the finished turn-buckle.The blank, having been rolled from a bar O, which may be of rectangularcross-section, to the form just described, has punched out from itsstraight portion 0 the thin web 10 to make the opening (1, Fig. 8, toform the straps b b. punch D and die E, (see Figs. 2 and 3,) of formcorresponding with said opening. The opening (I having been thuspunched, all that remains to be done according to our invention is theupsetting of the excessive length of metal in the end portions or headsa a from their outer faces. This we propose, generally, to accomplishwhile the rolled and punched blank is held in a die F F, such as isshown in Figs. 4 and 5, by means of punches G G, working through theends of the said die. The die F F represented is longitudinally divided,each half being the counterpart of the form which the finishedturn-buckle is to have,

This may be done by a except that there is extra space at e 6 (see Fig.4) to receive the excess of length of metal at the outer extremitiesff(see Figs. 8 and 9) of the heads or end portions (1 a, whence theupsetting of the metal begins for the production of the fullness at*Fig. 11. The punches G G may be of a transverse section correspondingwith and nearly as long as that intended for the outer extremities ofthe heads a, as shown at the right of Fig. 4, or they may be smaller, asshown at the left of the same figure, the punch in the latter caseserving not only to upset the head a, but to partly punch in it the holewhich has to be formed in the head for the nut of the finishedturnbuckle. The die F F being firmly closed While the punches G G areforced in, the pressure produced by the punches upsets the metal of theheads from the outer extremities of the latter and produces the desiredfullness at It is hardly necessary to mention that the rolling of theblank will be performed While the iron is heated. The punching of theopening (Z may be done cold; but it will be necessary to reheat previousto the upsetting operation.

Vhat We claim as our invention, and desire to secure by Letters Patent,is-

The improvement in the art of manufacturing turn-buckles, consisting infirst rolling from a bar a blank consisting of an oblong at theirjunction with the side portions which constitute the straps, and Whilethe blank is so confined upsetting the said swelled end portions tocomplete the heads of the turnbuckle by pressure applied to their outerfaces, substantially as herein set forth.

EDlVARD W'. MERRILL. JAMES BASS.

Witnesses:

FREDK. HAYNES, L. M. EGBERT. 7

